A 53-year-old man visited a previous hospital because of dyspnea. He was transferred to our hospital with a diagnosis of a ruptured Valsalva aneurysm. At surgery, the tip of aneurysm originated from the right sinus of Valsalva had ruptured into the right ventricular outflow tract. A longitudinal incision was made in the main pulmonary artery, and the rupture site was closed with continuous suture. The first Hemashield patch was sewn to the tissue around the aneurysm in the right ventricular outlet septum. After that, the second Hemashield patch was fixed to the patch of the right ventricular outlet septum by horizontal mattress suture from the aorta. There has been no problem for more than five years after surgery.